v1.1

FlySky have released firmware update (1.0.46.1428 11-Dec-2018) which fixes the USB joystick feature, adds some audible alarms, etc.
Unfortunately the repeating frames problem has not been addressed.

Here's a fixed version of that firmware. Use FS-I6X_10-Oct-2019_bugfix.exe to flash.

Also included are the original versions of the firmwares from 2017 and 2018 if you want to revert for some reason.

Note that the official 2018 updater does not support downgrading. You'll have to first flash the 2017 version (which does not mind downgrading).